Triple star systems can have mind-bending physics. All three objects orbit the system's center of mass, which usually results ...

On May 20, 1990, the Hubble Space Telescope sent its first image to Earth. This photo turned out to be 50% sharper than images from ground-based telescopes. In August of that year, Hubble made one of ...

Apophis will travel closer to us than any similarly sized astronomical object in recorded history, scientists said. It will ...

Any time you see a headline about an asteroid heading towards the planet, you can relax. Big and small asteroids fly by Earth ...